Silica gel pad fixing device

Abstract

The utility model discloses a silica gel pad fixing device which comprises a power source, an upper pressing plate and a lower pressing plate, and the power source is connected with the upper pressing plate and the lower pressing plate. The lower pressing plate is used for placing a material to be processed, the upper pressing plate is communicated with a vacuum pump, and a silica gel pad is adsorbed on the lower surface of the upper pressing plate in a vacuum manner through the vacuum pump. According to the utility model, the replacement efficiency of the silica gel pad is improved, so that the production efficiency is improved. And meanwhile, the safety performance is greatly improved, and the risks of scalding and bruising are avoided.

Description

Technical Field

[0001] The utility model relates to the field of shoe upper processing, in particular to a silicone pad fixing device. Background Art

[0002] A current heat sealing machine includes a power supply, an upper heating plate and a lower heating plate, wherein the power supply is connected to the upper heating plate and the lower heating plate to make them reach the working temperature; the lower heating plate is used to place the material to be processed and the mold, and the mold has positioning pins to position the material to be processed on the mold; the upper heating plate directly bonds and fixes the silicone pad. The material to be processed is the upper material to be processed.

[0003] During operation, the upper heating plate presses down on the lower heating plate or the lower heating plate presses up on the upper heating plate to heat and melt the processing material; during the repeated operation, the silicone pad is always in a high temperature state and is constantly nailed in and pulled out by the positioning pins of the mold. As a result, the silicone pad needs to be replaced after working to a certain degree or a certain frequency. However, to replace the silicone pad, it is necessary to wait for the silicone pad in a high temperature state to cool down, and then scrape the silicone pad from the upper heating plate after it cools down to room temperature or an operable temperature, and then re-fix the new silicone pad. The waiting time is long and there are many processes, which makes the production efficiency low.

[0004] To this end, the inventor disclosed a device for quickly replacing a silicone pad in Chinese patent document CN211968480U, which includes a power supply, an upper heating plate and a lower heating plate. The power supply is connected to the upper heating plate and the lower heating plate to make them reach the working temperature; the lower heating plate is used to place the material to be processed, and the upper heating plate is detachably connected to an intermediate plate, and the intermediate plate fixes the silicone pad. When the silicone pad needs to be replaced, the intermediate plate and the silicone pad can be directly disassembled as a whole and replaced with a new intermediate plate and silicone pad, so there is no need to wait, and the replacement is fast, which improves production efficiency.

[0005] The inventor found that when the silicone pad needs to be replaced, the middle plate and the silicone pad are directly disassembled as a whole. When the lifting end of the lock body is pushed downward to open the buckle, the lifting end of the lock body is also at a relatively high temperature. When disassembling and opening the buckle, it is necessary to push the lifting end carefully to prevent burns. This reduces the replacement efficiency of the silicone pad to a certain extent, thereby affecting production efficiency. There is also a risk of high-temperature burns and crushing injuries.

[0006] The inventor strives for perfection, conducts further experiments and researches, and finds that although the silicone pad is constantly nailed in and pulled out by the positioning nails during the working process, the silicone pad can still be adsorbed by vacuum, thus the present utility model is created.

[0007] It should be noted that the information disclosed in the background technology, such as the inventor's discovery, is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as an admission or suggestion in any form that the information constitutes the prior art already known to those skilled in the art, and the technical problems to be solved should not include guidance or suggestions for new technical means. Utility Model Content

[0008] In view of this, the purpose of the utility model is to propose a silicone pad fixing device, which can solve the technical problems of silicone pad replacement efficiency and the dangers of high-temperature scalding and crushing, so as to improve the replacement efficiency of silicone pads and thus improve production efficiency; at the same time, it also greatly improves the safety performance and avoids the technical effect of the risk of scalding and crushing.

[0009] The technical solutions adopted are:

[0010] A silicone pad fixing device includes a power supply, an upper pressing plate and a lower pressing plate, wherein the power supply is connected to the upper pressing plate and the lower pressing plate; the lower pressing plate is used to place the material to be processed, and the upper pressing plate is connected to a vacuum pump, through which a silicone pad is vacuum-adsorbed on the lower surface of the upper pressing plate.

[0011] Furthermore, a first vacuum groove is provided at the periphery away from the center of the upper pressing plate, and the silicone pad is vacuum-absorbed through the first vacuum groove; or an intermediate plate is provided between the silicone pad and the upper pressing plate, and a second vacuum groove is provided at the periphery away from the center of the intermediate plate, the vacuum pump absorbs the intermediate plate, and absorbs the silicone pad onto the intermediate plate through the second vacuum groove; or the silicone pad is bonded to the intermediate plate, and the intermediate plate is vacuum-absorbed onto the lower surface of the upper pressing plate by the vacuum pump.

[0012] Furthermore, a second stopper is provided in the first vacuum tank; or a fourth stopper is provided in the second vacuum tank.

[0013] Further, the second stopper is a toothed stopper; or the fourth stopper is a toothed stopper.

[0014] Furthermore, a first stopper is fixed on the side of the upper pressure plate, and the extended side of the first stopper abuts against the side of the silicone pad; or a third stopper is fixed on the side of the middle plate, and the extended side of the third stopper abuts against the side of the silicone pad.

[0015] Further, the first stopper is replaced by a stopper bar or a stopper ring; or the third stopper is replaced by a stopper bar or a stopper ring.

[0016] Furthermore, the middle plate is an aluminum plate.

[0017] Furthermore, flexible sealing rings are provided around the middle plate and the upper pressing plate.

[0018] Furthermore, the power source is a high frequency power source, and / or a heating device is fixed on the upper pressing plate and / or the lower pressing plate.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] Since the upper pressing plate is connected to a vacuum pump, a silicone pad is vacuum-adsorbed on the lower surface of the upper pressing plate through the vacuum pump. Therefore, when the silicone pad needs to be replaced, there is no need to push the lifting end carefully to prevent burns. The vacuum adsorption can be stopped directly, and the silicone pad can be directly desorbed and dropped. A new silicone pad can be directly vacuum-adsorbed again, which improves the replacement efficiency of the silicone pad and thus improves production efficiency. At the same time, it also greatly improves safety performance and avoids the risk of burns and crushing injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor.

[0022] Figure 1 This is a schematic structural diagram of a silicone pad fixing device of Example 1.

[0023] Figure 2 This is a schematic structural diagram of a silicone pad fixing device of Example 2.

[0024] Figure 3 It is a partially enlarged schematic diagram of Example 3 containing the first vacuum groove and the second stopper.

[0025] Figure 4 It is a partially enlarged schematic diagram of Example 3 containing a first vacuum groove and another second stopper.

[0026] Figure 5 This is a schematic diagram of the bottom view of the upper pressing plate of Example 3.

[0027] Figure 6 This is a schematic structural diagram of a silicone pad fixing device of Example 4.

[0028] Figure 7 This is a schematic structural diagram of a silicone pad fixing device of Example 6.

[0029] Figure 8 This is a schematic structural diagram of a silicone pad fixing device of Example 7.

[0030] Fig. 9 It is a partially enlarged schematic diagram of Example 8 containing the second vacuum groove and the fourth stopper.

[0031] Fig.10 It is a partially enlarged schematic diagram of Example 8 containing a second vacuum groove and another fourth stopper.

[0032] Fig.11 This is a schematic diagram of the bottom view of the middle plate of Example 8.

[0033] The correspondence between the serial numbers and feature names in the figure is as follows:

[0034] 1-power supply; 2-upper pressure plate; 3-lower pressure plate; 4-material to be processed; 5-vacuum pump; 6-silicone pad; 7-first vacuum groove; 8-first stopper; 9-second stopper; 10-middle plate; 11-positioning pin; 12-second vacuum groove; 13-third stopper, 14-fourth stopper. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only partial embodiments of the utility model, not all embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Example 1

[0037] See also Figure 1 As shown, a silicone pad fixing device includes a power supply 1, an upper pressing plate 2 and a lower pressing plate 3, wherein the power supply 1 is connected to the upper pressing plate 2 and the lower pressing plate 3; the lower pressing plate 3 is used to place a material 4 to be processed, and the upper pressing plate 2 is connected to a vacuum pump 5, through which a silicone pad 6 is vacuum adsorbed on the lower surface of the upper pressing plate 2.

[0038] During operation, the lower pressing plate places the material to be processed and the mold, and the mold has positioning pins 11 to position the material to be processed on the mold. The material to be processed is heated, and the optional heating methods include: conductive heating and / or high-frequency heating.

[0039] When high-frequency heating is used, the power source is a high-frequency power source, the upper pressing plate of the high-frequency power source is the positive / negative pole, and the lower pressing plate is the negative / positive pole, so that a high-frequency electric field can be generated between the upper pressing plate and the lower pressing plate, and high-frequency dielectric heating can be performed on the upper material to be processed in the mold, so that the material to be processed reaches the working temperature.

[0040] When conductive heating is used, a heating device is fixed on the upper pressing plate and / or the lower pressing plate, so that the upper pressing plate and / or the lower pressing plate have a heat conduction effect under the heating of the heating device; the heating device is electrically connected to the power supply to generate electric heat, and the material to be processed reaches the working temperature through conductive heating.

[0041] Conductive heating and high-frequency heating can also be combined for heating, for example, conductive heating is used first, and then high-frequency heating is used to make the material to be processed reach the working temperature.

[0042] During the working process, the silicone pad is constantly driven in and pulled out by the positioning nails 11.

[0043] In this way, when the silicone pad needs to be replaced, the vacuum pump is directly turned off to stop vacuum adsorption, and the silicone pad is directly desorbed and dropped. The vacuum pump is directly turned on for vacuum adsorption with a new silicone pad, thereby improving the replacement efficiency of the silicone pad to a certain extent, thereby improving production efficiency. At the same time, it also greatly improves safety performance and avoids the risk of scalding and crushing.

[0044] Vacuum adsorption is to connect the vacuum pump's exhaust port to the air hole channel of the upper platen to vacuum adsorb the silicone pad. The size and shape of the air hole channel are not limited, as long as there is an air hole channel to achieve vacuum adsorption. When the silicone pad is vacuumed, a vacuum surface is formed on the upper surface of the silicone pad that is vacuum adsorbed, thereby vacuum adsorbing the silicone pad.

[0045] As a preferred specific implementation, a first vacuum groove 7 is provided on the periphery of the upper pressing plate 2 away from the center, and the silicone pad 6 is vacuum-absorbed through the first vacuum groove 7. The first vacuum groove is communicated with the air hole channel of the upper pressing plate.

[0046] The inventors found that although the silicone pad is constantly driven in and out by the positioning nails 11 during the working process, the silicone pad can still be vacuum-absorbed, which can be explained by the following principle:

[0047] The vacuum adsorption force can be estimated by the following calculation formula:

[0048] F=P·S

[0049] Among them, F is the adsorption force; P is the vacuum degree, and S is the upper surface area of ​​the adsorbed silicone pad.

[0050] The basic principle is: the higher the vacuum degree, the greater the adsorption force; the larger the upper surface area of ​​the adsorbed silicone pad, the greater the adsorption force.

[0051] The silicone pad is repeatedly pierced by the positioning pins during operation, so it is inevitable that it will be pierced, causing leakage, greatly increasing the vacuum flow and reducing the vacuum degree. Generally, the vacuum adsorption increases by 1 cm. 2A silicone pad of 10mm thickness can generate an adsorption force of about 1 kg; while a 10mm thick silicone pad of the same area weighs only about 0.002 kg, and the adsorption force is about 500 times the weight! The inventor further creatively sets the first vacuum groove in the peripheral area of ​​the upper pressing plate away from the center (because the positioning nails are basically in the central area), and uses the characteristic that the vacuum suction force per unit area is much greater than the weight of the silicone itself to automatically close the pierced nail holes: for example, when a nail hole is pierced, the surrounding silicone will still be tightly attached to the upper pressing plate under the pressure of the strong vacuum suction, and the bonding surface can seal the air in the nail hole to diffuse to the first vacuum grooves around it. The direction of air flow diffusion can be seen in Figure 1 As shown by the arrows A1 and A2 in FIG. 1 , the pierced nail hole is automatically closed.

[0052] In this way, in the preferred embodiment of setting the first vacuum groove, even if the silicone pad has punctured nail holes, no air leakage will occur, so a vacuum pump with a smaller flow rate can be selected.

[0053] The shape and number of the first vacuum grooves may not be specifically limited. The shape may be, for example, a ring-shaped first vacuum groove, or several long strips of first vacuum grooves. The number includes, but is not limited to, one ring-shaped first vacuum groove, two ring-shaped first vacuum grooves, three long strips of first vacuum grooves on the left and right, one or two long strips of first vacuum grooves on the front and back, and so on.

[0054] Example 2

[0055] Based on Example 1, see Figure 2 As shown, a first stopper 8 is fixed to the side of the upper pressure plate 2, and the extended side of the first stopper 8 abuts against the side of the silicone pad 6. The number of first stops located on the side is not limited and is set according to actual needs. The function of the first stopper is to prevent the silicone pad from expanding outward. Due to the effect of thermal expansion and contraction, the silicone pad will expand outward when heated, and the first stopper can prevent it from freely expanding outward and deforming and swelling, thereby increasing the service life of the silicone pad.

[0056] Example 3

[0057] Based on Example 1, see Figure 3-Figure 5 As shown, a second stopper 9 is provided in the first vacuum groove 7 of the upper pressing plate 2. As a specific embodiment, the second stopper is a toothed stopper, which can be as follows: Figure 3 The straight tooth block (straight tooth for short) shown in FIG. Figure 4 The oblique toothed stopper (helical tooth for short) shown in the figure is, for example, a toothed stopper formed by an inclined surface inclined toward the center at one end and a vertical surface at the other end. Of course, the shape of the second stopper is included here, but not limited thereto.

[0058] The second stopper has the same function as the first stopper, but is located at a different position. Figure 5 As shown, the silicone pad under the first vacuum groove will bulge due to vacuum adsorption, which can just allow the second stopper to be embedded in the bulged silicone pad, so that the second stopper can also play the role of preventing the silicone pad from expanding freely outward and deforming and swelling when it expands, without affecting the contraction of the silicone pad when cooling down.

[0059] Example 4

[0060] Based on Example 1, see Figure 6 As shown, the silicone pad 6 is bonded to the middle plate 10, and the middle plate 10 is vacuum-adsorbed on the lower surface of the upper pressing plate 2 by the vacuum pump 4. As a specific embodiment, the middle plate is an aluminum plate. The aluminum plate is light in weight and will not affect adsorption.

[0061] The middle plate and the silicone pad are integrated as a whole, and can be firmly adsorbed, which can also improve the replacement efficiency.

[0062] As a specific implementation, flexible sealing rings are arranged around the middle plate and the upper pressing plate, and the function of the flexible sealing rings is to avoid or reduce air leakage around the middle plate and the upper pressing plate.

[0063] Example 5

[0064] Referring to Example 2, the difference from Example 2 is that the first stopper of Example 1 is replaced by a stopper bar or a stopper ring. The stopper bar is a strip longer than the first stopper; the stopper ring is a closed stopper ring connecting the stopper bars on four sides. The stopper bar or the stopper ring of this embodiment can also play the role of the first stopper.

[0065] It should be noted that the above embodiments 1-5 can be appropriately combined or replaced to form more embodiments.

[0066] Example 6

[0067] The silicone pad can be directly vacuum-adsorbed on the lower surface of the upper pressing plate by a vacuum pump, as shown in Example 1. The silicone pad can also be indirectly vacuum-adsorbed on the lower surface of the upper pressing plate by a vacuum pump.

[0068] See Figure 7 As shown, different from Example 1, an intermediate plate 10 is provided between the silicone pad 6 and the upper pressing plate 2, and the intermediate plate 10 is provided with a second vacuum groove 12. The vacuum pump 5 adsorbs the intermediate plate 10, and adsorbs the silicone pad 6 on the intermediate plate 10 through the second vacuum groove. In this way, indirect adsorption is achieved through the intermediate plate. The intermediate plate and the silicone pad are vacuum adsorbed at the same time.

[0069] The middle plate can be an aluminum plate, and can be a relatively thin plate, for example, a plate with a thickness of less than 10 mm, such as a plate with a thickness of 3 mm, 4 mm or 5 mm. The use of the middle plate can further ensure and protect the upper pressing plate from being pierced by the positioning nails.

[0070] Compared with Example 4, the silicone pad is not bonded to the middle plate, the vacuum pump vacuum absorbs the middle plate, and absorbs the silicone pad to the middle plate through the second vacuum groove. This embodiment uses the middle plate instead of the adhesive, that is, the silicone pad is bonded to the middle plate without the adhesive. When the silicone pad needs to be replaced, the silicone pad can be directly replaced without replacing the middle plate at the same time.

[0071] As a preferred specific implementation, the second vacuum groove 12 is provided at the periphery of the middle plate 10 away from the center, and the silicone pad 6 is vacuum-absorbed through the second vacuum groove 12. The second vacuum groove 12 is communicated with the air hole channel of the upper pressing plate 2.

[0072] Similar to the first vacuum groove in Example 1, the shape and number of the second vacuum groove are not specifically limited. The shape may be, for example, a ring-shaped second vacuum groove, or several long strips of second vacuum grooves. The number includes, but is not limited to, for example, one ring-shaped second vacuum groove, two ring-shaped second vacuum grooves, three long strips of second vacuum grooves on the left and right, one or two long strips of second vacuum grooves on the front and back, and so on.

[0073] Example 7

[0074] Based on the embodiment 6, this embodiment can be formed by combining the embodiment 2. Since there is an intermediate plate, the features corresponding to the embodiment 2 are set on the intermediate plate. Figure 8 As shown, a third stopper 13 is fixed to the side of the middle plate 10, and the extended side of the third stopper 13 abuts against the side of the silicone pad 6. The number of third stops located on the side is not limited and is set according to actual needs. The function of the third stopper is to prevent the silicone pad from expanding outward. Due to the effect of thermal expansion and contraction, the silicone pad will expand outward when heated, and the third stopper can prevent it from freely expanding outward and deforming and swelling, thereby increasing the service life of the silicone pad.

[0075] Example 8

[0076] Similarly, based on Example 6, this embodiment can be formed in combination with Example 3. Figure 9-11 As shown, a fourth stopper 14 is provided in the second vacuum groove 12 of the middle plate 10. As a specific embodiment, the fourth stopper 14 is a toothed stopper, which can be as follows: Fig. 9 The straight tooth block (straight tooth for short) shown in FIG. Fig.10The oblique toothed stopper (helical tooth for short) shown in the figure is, for example, a toothed stopper formed by an inclined surface inclined toward the center at one end and a vertical surface at the other end. Of course, the shape of the fourth stopper is included here, but not limited thereto.

[0077] The fourth stopper has the same function as the third stopper, but is located at different positions. The silicone pad under the third vacuum groove will swell due to vacuum adsorption, which allows the fourth stopper to be embedded in the swollen silicone pad. Thus, the fourth stopper can also play the role of preventing the silicone pad from freely expanding outward and deforming and expanding when it expands, without affecting the shrinkage of the silicone pad when the temperature drops.

[0078] Example 9

[0079] Similarly, on the basis of Example 6, this embodiment can be formed in combination with Example 5. That is, the third stopper of Example 6 is replaced by a stopper bar or a stopper ring. The stopper bar is a strip longer than the first stopper; the stopper ring is a closed stopper ring connecting the stopper bars on four sides. The stopper bar or the stopper ring of this embodiment can also play the role of the third stopper.

[0080] It should be noted that the serial numbers first, second, third, fourth, etc. in this specification are for distinguishing the description and do not contain any order, and do not express or imply relative importance.

[0081] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the protection scope of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A silicone pad fixing device, comprising a power supply, an upper pressing plate and a lower pressing plate, wherein the power supply is connected to the upper pressing plate and the lower pressing plate; the lower pressing plate is used to place the material to be processed, characterized in that: The upper pressing plate is connected to a vacuum pump, and a silica gel pad is vacuum-adsorbed on the lower surface of the upper pressing plate through the vacuum pump.

2. The silicone pad fixing device according to claim 1, characterized in that: A first vacuum groove is provided on the periphery away from the center of the upper pressing plate, and the silicone pad is vacuum-absorbed through the first vacuum groove; or an intermediate plate is provided between the silicone pad and the upper pressing plate, and a second vacuum groove is provided on the periphery away from the center of the intermediate plate, and the vacuum pump absorbs the intermediate plate and absorbs the silicone pad onto the intermediate plate through the second vacuum groove; or the silicone pad is bonded to the intermediate plate, and the intermediate plate is vacuum-absorbed onto the lower surface of the upper pressing plate by the vacuum pump.

3. The silicone pad fixing device according to claim 2, characterized in that: A second stopper is provided in the first vacuum groove; or a fourth stopper is provided in the second vacuum groove.

4. The silicone pad fixing device according to claim 3, characterized in that: The second stopper is a toothed stopper; or the fourth stopper is a toothed stopper.

5. The silicone pad fixing device according to claim 2, characterized in that: A first stopper is fixed on the side of the upper pressure plate, and the extended side of the first stopper abuts against the side of the silicone pad; or a third stopper is fixed on the side of the middle plate, and the extended side of the third stopper abuts against the side of the silicone pad.

6. The silicone pad fixing device according to claim 5, characterized in that: The first stopper is replaced by a stopper bar or a stopper ring; or the third stopper is replaced by a stopper bar or a stopper ring.

7. The silicone pad fixing device according to claim 2, characterized in that: The middle plate is an aluminum plate.

8. The silicone pad fixing device according to claim 2, characterized in that: Flexible sealing rings are arranged around the middle plate and the upper pressing plate.

9. The silicone pad fixing device according to claim 1, characterized in that: The power source is a high frequency power source, and / or a heating device is fixed on the upper pressing plate and / or the lower pressing plate.

Images